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Claude 3.7 Sonnet vs LongCat-Flash-Chat

Both models are evenly matched across the benchmarks. LongCat-Flash-Chat is 11.4x cheaper per token.

Anthropic · Meituan · Updated for 2026

Which is better?

Claude 3.7 Sonnet outperforms in 3 benchmarks (GPQA, IFEval, SWE-Bench Verified), while LongCat-Flash-Chat is better at 3 benchmarks (AIME 2025, MATH-500, Terminal-Bench). Both models are evenly matched across the benchmarks.

On price, LongCat-Flash-Chat is roughly 11.4x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

Claude 3.7 Sonnet also accepts a larger context window (200,000 input tokens), making it the stronger choice for long documents and large codebases.

Based on current benchmark, pricing, and model metadata for 2026.

Choose Claude 3.7 Sonnet

  • you process long inputs — it offers a 200,000 token context window

Choose LongCat-Flash-Chat

  • cost matters — it's about 11.4x cheaper per token
  • you want the most recent training data — it shipped Aug 2025
  • you need open weights you can self-host or fine-tune

At a glance

The differences that matter most.

Claude 3.7 Sonnet
Anthropic
LongCat-Flash-Chat
Meituan
Benchmark wins
3 of 6
3 of 6
Input price
$3.00 / M
$0.30 / M
Output price
$15.00 / M
$1.20 / M
Context window
200,000
128,000
Released
Feb 2025
Aug 2025
License
Proprietary
MIT

Performance Benchmarks

Comparative analysis across standard metrics

6 benchmarks

Claude 3.7 Sonnet outperforms in 3 benchmarks (GPQA, IFEval, SWE-Bench Verified), while LongCat-Flash-Chat is better at 3 benchmarks (AIME 2025, MATH-500, Terminal-Bench).

Both models are evenly matched across the benchmarks.

Mon Aug 24 2026 • llm-stats.com

Arena Performance

Playground indexes and blind preference scores

Pricing Analysis

Price comparison per million tokens

LongCat-Flash-Chat costs less

For input processing, Claude 3.7 Sonnet ($3.00/1M tokens) is 10.0x more expensive than LongCat-Flash-Chat ($0.30/1M tokens).

For output processing, Claude 3.7 Sonnet ($15.00/1M tokens) is 12.5x more expensive than LongCat-Flash-Chat ($1.20/1M tokens).

In conclusion, Claude 3.7 Sonnet is more expensive than LongCat-Flash-Chat.*

* Using a 3:1 ratio of input to output tokens

Lowest available price from all providers
Mon Aug 24 2026 • llm-stats.com
Anthropic
Claude 3.7 Sonnet
Input tokens$3.00
Output tokens$15.00
Best providerAnthropic
Meituan
LongCat-Flash-Chat
Input tokens$0.30
Output tokens$1.20
Best providerMeituan
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

Claude 3.7 Sonnet accepts 200,000 input tokens compared to LongCat-Flash-Chat's 128,000 tokens. Both models can generate responses up to 128,000 tokens.

Anthropic
Claude 3.7 Sonnet
Input200,000 tokens
Output128,000 tokens
Meituan
LongCat-Flash-Chat
Input128,000 tokens
Output128,000 tokens
Mon Aug 24 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Claude 3.7 Sonnet supports multimodal inputs, whereas LongCat-Flash-Chat does not.

Claude 3.7 Sonnet can handle both text and other forms of data like images, making it suitable for multimodal applications.

Claude 3.7 Sonnet

Text
Images
Audio
Video

LongCat-Flash-Chat

Text
Images
Audio
Video

License

Usage and distribution terms

Claude 3.7 Sonnet is licensed under a proprietary license, while LongCat-Flash-Chat uses MIT.

License differences may affect how you can use these models in commercial or open-source projects.

Claude 3.7 Sonnet

Proprietary

Closed source

LongCat-Flash-Chat

MIT

Open weights

Release Timeline

When each model was launched

Claude 3.7 Sonnet was released on 2025-02-24, while LongCat-Flash-Chat was released on 2025-08-29.

LongCat-Flash-Chat is 6 months newer than Claude 3.7 Sonnet.

Claude 3.7 Sonnet

Feb 24, 2025

1.5 years ago

LongCat-Flash-Chat

Aug 29, 2025

12 months ago

6mo newer

Knowledge Cutoff

When training data ends

Neither model specifies a knowledge cutoff date.

Unable to compare the recency of their training data.

No cutoff dates available

Provider Availability

Claude 3.7 Sonnet is available from Anthropic, Bedrock, Google. LongCat-Flash-Chat is available from Meituan.

Claude 3.7 Sonnet

anthropic logo
Anthropic
Input Price:Input: $3.00/1MOutput Price:Output: $15.00/1M
bedrock logo
AWS Bedrock
Input Price:Input: $3.00/1MOutput Price:Output: $15.00/1M
google logo
Google
Input Price:Input: $3.00/1MOutput Price:Output: $15.00/1M

LongCat-Flash-Chat

meituan logo
Meituan
Input Price:Input: $0.30/1MOutput Price:Output: $1.20/1M
* Prices shown are per million tokens

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Judge for yourself.

Run your own prompts against Claude 3.7 Sonnet and LongCat-Flash-Chat side-by-side, then vote on the output you prefer.

Claude 3.7 Sonnet
✓ Preferred
LongCat-Flash-Chat
Open in Playground

FAQ

Common questions about Claude 3.7 Sonnet vs LongCat-Flash-Chat.

Which is better, Claude 3.7 Sonnet or LongCat-Flash-Chat?

Both models are evenly matched across the benchmarks. Claude 3.7 Sonnet is made by Anthropic and LongCat-Flash-Chat is made by Meituan. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does Claude 3.7 Sonnet compare to LongCat-Flash-Chat in benchmarks?

Claude 3.7 Sonnet scores MATH-500: 96.2%, IFEval: 93.2%, MMMLU: 86.1%, GPQA: 84.8%, TAU-bench Retail: 81.2%. LongCat-Flash-Chat scores MATH-500: 96.4%, MMLU: 89.7%, IFEval: 89.6%, ZebraLogic: 89.3%, HumanEval: 88.4%.

Is Claude 3.7 Sonnet cheaper than LongCat-Flash-Chat?

LongCat-Flash-Chat is 10.0x cheaper for input tokens. Claude 3.7 Sonnet costs $3.00/M input and $15.00/M output via anthropic. LongCat-Flash-Chat costs $0.30/M input and $1.20/M output via meituan.

What are the context window sizes for Claude 3.7 Sonnet and LongCat-Flash-Chat?

Claude 3.7 Sonnet supports 200K tokens and LongCat-Flash-Chat supports 128K tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between Claude 3.7 Sonnet and LongCat-Flash-Chat?

Key differences include context window (200K vs 128K), input pricing ($3.00 vs $0.30/M), multimodal support (yes vs no), licensing (Proprietary vs MIT). See the full comparison above for benchmark-by-benchmark results.

Who makes Claude 3.7 Sonnet and LongCat-Flash-Chat?

Claude 3.7 Sonnet is developed by Anthropic and LongCat-Flash-Chat is developed by Meituan.

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